Google Calculator Breaks On New Years

Talking about those Y2K glitches (kidding), the Google Calculator seemed to have stopped working yesterday, all of a sudden. I tried it on New Years and it did not work. But this morning, it appears to be working again.

A search on 2+2 typically brought back a response from Google that looked like:

But yesterday, it just returned weird web results.

It seems like it was down for about 7 hours or so yesterday, based on tracking this Digg post.